1. The document discusses the chemical bonding concepts of Lewis dot structures, valence electrons, electronegativity, and ionization energy. It describes an activity where students draw Lewis dot structures of elements and organize them based on these properties. 2. Gilbert Lewis is credited with discovering covalent bonds and representing atoms with Lewis dot structures that show valence electrons. His work established that chemical bonds form through the transfer or sharing of electrons between atoms. 3. The document guides students to draw Lewis dot structures, identify trends in valence electrons, electronegativity, and ionization energy for different elements, and recognize how these properties relate to bond formation.

1. Let’s REVIEW !!!

2. Chemical Bonding

3. ACTIVITY:
Picture Perfect!!
1. Paste the pieces of paper in a
colored paper to form a
picture.
2. The first group to finished the
task should raise their output.

5. Word Drill
• Arrange the letters to
reveal the name of the man
in the picture.

7. • Gilbert Newton Lewis was an
American Physical Chemist. He
is best known for his discovery
of covalent bond and his
concept of electron pairs.

8. • He explained the idea that
chemical bonds were formed by
the transfer of electron, so each
atom had a complete set of eight
electrons. His Lewis Dot Symbol
have shaped theories of chemical
bonding.

9. • Lewis symbol is a symbol in
which the electrons in the
valence shell of an atom are
represented by dots, placed
around the element symbol.

10. Let’s Learn How to
Draw Lewis Dot
Symbol

11. “How many valence electrons
does the element Chlorine
have?”

12. •Write the Lewis
Symbol of the
representative
elements.

13. •Show the relationship
among the number of
valence electrons,
electronegativity value
and ionization energy.

14. Recognize the importance
of using Lewis Symbol in
representing valence
electrons.

15. • Make a group of five.
• Complete the table by filling up the
elements' Group number, valence electrons,
Lewis dot symbol, Electronegativity and
Ionization energy.
• Use the periodic table to fill up the
electronegativity and ionization energy.
• A representative will present in front after 10
minutes.

16. Rubric
Category 1 2 3
Delivery The presentation
wasn’t well
executed
The presentation is
good and the idea
was explained
clearly
The presentation/
output was well
executed and the
idea was explained
clearly.
Content Group output has
poor content
Group output has
good content
Group output has
excellent content.
Organiza
tion
Most group
members did not
participate.
Only some of the
group members
worked together.
All group members
participate and
worked together.
Total Score

17. Chemical
Symbol
Family
Number
Valence
Electrons
Lewis
Dot
Electronegativi
ty
Ionization
Energy
Al
Ca
S
F
Li

18. Chemical
Symbol
Family
Number
Valence
Electrons
Lewis
Dot
Electronegativi
ty
Ionization
Energy
Al
III 3 1.5 578
Ca
II 2 1.0 1312
S
VI 6 2.5 1000
F
VII 7 4.0 1681
Li
I 1 0.98 520

19. Questions to answer
• 1. Based on the activity, arrange
the elements in the order of
increasing
a. Valence electrons
b. Electronegativity
c. Ionization energy

20. 2. What do you notice with
the number of valence
electrons, electronegativity
value and ionization energy
of the elements?

21. • 3. What kind of element has
the highest tendency to attract
electrons? Why?
• 4. What kind of elements
requires high energy to
remove its valence electrons?
Why?

22. What represents
you?

23. Draw the Lewis Dot Symbol of the
following atoms and arrange the
elements based on its electronegativity
and ionization energy in increasing order.
1. Mg
2. Si
3. I

24. • Electronegativity
• Mg < Si < I
• Ionization Energy
• Mg <Si < I

25. Answer the following.
1. What is a covalent bond?
2. What are the two types of
bonds?Define each.

26. Thank you.
I hope you learned :)